CN103111529B - Machining method of U-shaped sheet metal part resilience mould tire - Google Patents
Machining method of U-shaped sheet metal part resilience mould tire Download PDFInfo
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- CN103111529B CN103111529B CN201310089356.2A CN201310089356A CN103111529B CN 103111529 B CN103111529 B CN 103111529B CN 201310089356 A CN201310089356 A CN 201310089356A CN 103111529 B CN103111529 B CN 103111529B
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Abstract
The invention discloses a machining method of a U-shaped sheet metal part resilience mould tire; the method comprises the following steps of: (1) reversely scanning each resilience mould tire tangent plane full pattern to obtain the two-dimensional data of each resilience mould tire tangent plane full pattern; (2) smoothing the two-dimensional data of each resilience mould tire tangent plane full pattern; (3) converting two-dimensional line data into a three-dimensional space by taking a datum line and a positioning line as the coordinating benchmark according to the position relation among the resilience mould tire tangent plane full patterns; (4) building the resilience shape curved surface of the U-shaped sheet metal part by the line of each resilience mould tire tangent plane full pattern in the three-dimensional space; (5) designing a three-dimensional resilience mould tire digifax by the resilience shape curved surface of a U-shaped sheet metal part; and (6) digitally milling the resilience mould tire by three-dimensional resilience mould tire digifax programming. According to the machining method, the manual machining of the resilience mould tire is replaced with the CNC (computer numerical control) machining, so that the work efficiency and the machining precision can be greatly improved.
Description
Technical field
The present invention relates to a kind of processing method of Aircraft Sheet Metal Parts resilience mould tire.
Background technology
For the analog-U shaped sheet metal part of deep camber covering, because curvature is large, after shaping by part mould tire, part has rebound phenomenon and occurs, as shown in Figure 1.In order to eliminate the impact of resilience on part, usually need to make a stage die tire slightly less than forming parts mould tire by empirical value, i.e. resilience mould tire, it is smaller than part normal value at part opening section, although part is narrower than normal part when resilience mould tire is shaping, owing to there being resilience, when part takes off from resilience mould tire, part can spring back to normal width substantially, simply corrects, just complete the processing of part as long as part is now put on part mould tire.
Present stage, the resilience mould tire of U-shaped sheet metal part provides resilience mould tire tangent plane full pattern by empirical value by panel beating factory, loft workshop is again by resilience mould tire tangent plane full pattern processing resilience tangent plane model, and then manufacture resilience mould tire by Mo Tai factory workman by resilience tangent plane model is manual, in process, workman will use streamline chi correction mould tire curved surface radian repeatedly, the more difficult processing of mould tire that curved surface curvature is large, tyre surface is complicated, this processing method not only wastes time and energy but also there is the inaccurate hidden danger of quality of tyre surface.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of processing method improving the U-shaped sheet metal part resilience mould tire of resilience mould tire working (machining) efficiency and machining accuracy is provided.
For achieving the above object, the technical solution used in the present invention is:
The processing method of U-shaped sheet metal part resilience mould tire, concrete steps are as follows:
1) according to the radian change difference determination resilience mould tire tangent plane full pattern quantity of U-shaped sheet metal part, reverse scanning each resilience mould tire tangent plane full pattern, obtains each resilience mould tire tangent plane full pattern 2-D data;
2) to the smoothing process of 2-D data of each resilience mould tire tangent plane full pattern;
3) according to the position relationship between each resilience mould tire tangent plane full pattern, with datum line and position line for coordinating benchmark, two-dimensional line bar data are transformed in three dimensions;
4) in three dimensions, the resilience appearance curved surface of U-shaped sheet metal part is constructed with each resilience mould tire tangent plane full pattern lines;
5) three-dimensional resilience mould tire digital-to-analogue is designed with the resilience appearance curved surface of U-shaped sheet metal part;
6) the digitlization milling processing of resilience mould tire is carried out with three-dimensional resilience mould tire digital-to-analogue programming.
Beneficial effect of the present invention: the processing method of the U-shaped sheet metal part resilience mould tire of the present invention, adopts Digit Control Machine Tool processing to instead of manual processing resilience mould tire, substantially increases operating efficiency and machining accuracy.
Accompanying drawing explanation
Fig. 1 contrasts before and after U-shaped sheet metal part resilience.
Fig. 2 is the resilience mould tire tangent plane full pattern of the U-shaped sheet metal part in the embodiment of the present invention 1.
Fig. 3 is the resilience mould tire contoured procedure chart of the U-shaped sheet metal part in the embodiment of the present invention 1.
Fig. 4 is the shaping figure of U-shaped sheet metal part resilience mould tire in the embodiment of the present invention 1.
Detailed description of the invention
The resilience mould tire processing method of the U-shaped sheet metal part of embodiment 1 aircraft
Aircraft has symmetrical U-shaped sheet metal part, and hyperbolicity is comparatively large, and these parts all need resilience mould tire and carry out supplement production processing.The processing method of concrete resilience mould tire is as follows:
1) the resilience mould tire tangent plane full pattern that provides of panel beating factory as shown in Figure 2, resilience mould tire tangent plane full pattern sets datum line 1, position line 2 and part edge line 3 respectively, datum line 1 is mutually vertical with position line 2, radian according to U-shaped sheet metal part to be processed determines processing resilience mould tire tangent plane full pattern quantity by panel beating factory, in the present embodiment, resilience mould tire tangent plane full pattern is 6, respectively reverse scanning is carried out to 6 resilience mould tire tangent plane full patterns, obtain the 2-D data of 6 groups of resilience mould tire tangent plane full patterns.
2) to the smoothing process of 2-D data of the 6 groups of resilience mould tire tangent plane full patterns obtained, deviation data out of the ordinary is rejected.
3) as shown in Figure 3, according to spacing and position relationship between 6 groups of resilience mould tire tangent plane full patterns, be coordinate benchmark with datum line 1 and position line 2, datum line 1 and the position line 2 of each resilience mould tire tangent plane full pattern will align mutually, two-dimensional line bar data are transformed in three dimensions, form External Shape curved surface 4.
4) as shown in Figure 4, in three dimensions, construct the resilience appearance curved surface of U-shaped sheet metal part with each resilience mould tire tangent plane full pattern lines, in Fig. 4, numbering 5 is pin hole, and in Fig. 4, numbering 6 is U-shaped sheet metal part tire line.
5) three-dimensional resilience mould tire digital-to-analogue is designed with the resilience appearance curved surface of U-shaped sheet metal part.
6) the digitlization milling processing of resilience mould tire is carried out with three-dimensional resilience mould tire digital-to-analogue programming.
Because part is symmetrical, resilience mould tire frock digital-to-analogue only designs one in symmetrical U-shaped sheet metal part, another, with the specular past, finally carries out digital control milling processing by resilience mould tire digital-to-analogue again, obtains the resilience mould tire of the symmetrical U-shaped sheet metal part of aircraft.
Claims (1)
- The processing method of 1.U type sheet metal part resilience mould tire, is characterized in that: described U-shaped sheet metal part is symmetrical and hyperbolicity is comparatively large, and the processing method of U-shaped sheet metal part resilience mould tire is as follows:1) according to the resilience mould tire tangent plane full pattern that panel beating factory provides, resilience mould tire tangent plane full pattern sets datum line (1), position line (2) and part edge line (3) respectively, datum line (1) is mutually vertical with position line (2), according to the radian change difference determination resilience mould tire tangent plane full pattern quantity of U-shaped sheet metal part, reverse scanning each resilience mould tire tangent plane full pattern, obtains each resilience mould tire tangent plane full pattern 2-D data;2) to the smoothing process of 2-D data of each resilience mould tire tangent plane full pattern, individual deviation data are rejected;3) according to spacing and position relationship between each resilience mould tire tangent plane full pattern, with datum line (1) and position line (2) for coordinating benchmark, datum line (1) and the position line (2) of each resilience mould tire tangent plane full pattern will align mutually, and two-dimensional line bar data are transformed in three dimensions;4) in three dimensions, the resilience appearance curved surface of U-shaped sheet metal part is constructed with each resilience mould tire tangent plane full pattern lines;5) three-dimensional resilience mould tire digital-to-analogue is designed with the resilience appearance curved surface of U-shaped sheet metal part;6) the digitlization milling processing of resilience mould tire is carried out with three-dimensional resilience mould tire digital-to-analogue programming;7) because part is symmetrical, resilience mould tire frock digital-to-analogue only designs one in symmetrical U-shaped sheet metal part, and another is gone over specular, finally carries out digital control milling processing by resilience mould tire digital-to-analogue again, obtains the resilience mould tire of symmetrical U-shaped sheet metal part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310089356.2A CN103111529B (en) | 2013-03-20 | 2013-03-20 | Machining method of U-shaped sheet metal part resilience mould tire |
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| CN201310089356.2A CN103111529B (en) | 2013-03-20 | 2013-03-20 | Machining method of U-shaped sheet metal part resilience mould tire |
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| CN103111529A CN103111529A (en) | 2013-05-22 |
| CN103111529B true CN103111529B (en) | 2015-03-11 |
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| CN103272951B (en) * | 2013-06-14 | 2016-01-20 | 沈阳飞机工业（集团）有限公司 | Tangent plane model staggered form mould tire manufacture method |
| CN105956298A (en) * | 2016-05-10 | 2016-09-21 | 哈尔滨飞机工业集团有限责任公司 | Reverse modelling method for complex hyperboloidal semi-closed structure |
| CN109176069A (en) * | 2018-10-10 | 2019-01-11 | 北京京科兴业科技发展有限公司 | A kind of model small lot processing tool and processing method |
| CN109902338B (en) * | 2019-01-16 | 2023-05-05 | 沈阳飞机工业（集团）有限公司 | Modeling method for rebound digital model of sheet metal part with sag |
| CN111805813A (en) * | 2020-06-12 | 2020-10-23 | 陕西飞机工业（集团）有限公司 | Modeling processing method of high-temperature forming male die |
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| JPH07296191A (en) * | 1994-04-21 | 1995-11-10 | Matsushita Electric Ind Co Ltd | Metallic mold draught verifying method for free curved surface |
| JP2004249337A (en) * | 2003-02-21 | 2004-09-09 | Hisao Yamazaki | Structure of laminated die using thick plate and its manufacturing method |
| CN100474191C (en) * | 2007-11-28 | 2009-04-01 | 天津二十冶建设有限公司 | Bending-torsional non-linear variable-diameter tube pressed mould manufacture method |
| CN101702185B (en) * | 2009-11-05 | 2011-06-15 | 西北工业大学 | Method for designing workpiece model for manufacturing aircraft sheet metal components |
| CN102120244A (en) * | 2010-12-07 | 2011-07-13 | 成都飞机工业（集团）有限责任公司 | Rapid design method of tyre mould |
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